how do you call a breakup for a relation that wasnt one

i hate unlabeled situationships, yet i always end up in some shit like this

we met in summer 2024 but only got closer during winter of the same year.

they then disappeared on my bday (spring 2025) after harsh words and an argument that was their fault

they came back in december last year, saying that they couldnt get over me and some blabla i fell for.

everything was sooo fine until may of thisyear; they grew distant and i had to push them to tell me the truth like a week ago. they sent me paragraphs about how they didn't feel the same about me anymore, that our recent arguments made it worse and all.

honestly the first thing i felt was complicated. every time i recall the whole situation i just get mad. as if i was toyed with. how can someone suddenly lose feelings over arguments????esp when they were at fault?? im still so frustrated to this day because they had the audacity to keep me around without wanting to be honest (while also always telling me to be straightforward)

i dont knw how to get over the sentiment of being angry, i wish i could just insult them. mind you i didnt even answer the paragraphs lolol, straight up blocked them everywhere

i guess im not super sad over it (yet?) because the distance kind of prepared me..? im pretty avoidant too so i guess there was a sort of relief  but it's true the void is present,, we were both together in our struggles since we met as mentally ill teens (esp since they had bpd) going through hospitals docs nd all. it was reassuring to have someone else, although pretty toxic too

Sigh Everything is so confusing